WMP9.0 is incompatable with WinXpPro with Chinese(tradi)setting to un-UnicodePgm

I bought the WinXp Pro English version, and install the
Chinese traditional language support. In order to run
Chinese Games properly. I have to set "Language for Un-
unicode program" to "Chinese Taiwan". However, when I
when to Xbox.com to watch WMP9.0 videos, it got error.
None-WMP9.0 player-list videos all work fine.

If I switch the "Language for Un-unicode program" back
to "United States English", the WMP9.0 play the video on
Xbox.com, however, WinXp doesn't show Chinese in Games
anymore.

I also tried the WMP9.0 Chinese Traditional version, but
the same error occured.